Aluminum battery negative electrode and anodic oxidation preparation method and application thereof
An anodizing, aluminum battery technology, applied in battery electrodes, electrode manufacturing, circuits, etc., can solve problems affecting the safety and cycle stability of aluminum batteries, affecting the number and rate of ion migration, and hindering the contact area between aluminum electrodes and electrolytes and other problems, to achieve the effect of increasing the effective electrochemical area, avoiding corrosion and dendrite problems, and improving electrochemical stability.
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Embodiment 1
[0032] The preparation method of the aluminum battery negative electrode material involved in the present invention specifically includes the following steps:
[0033] Step 1: Put the cleaned aluminum foil into ammonium adipate electrolyte as anode, at 10V, 1mA·cm -2 Anodization was performed at the specified voltage and current density within the range. During the anodizing process, after the applied voltage rises to the specified voltage of 10V, the constant-voltage anodizing is performed for 10min.
[0034] Step 2: Use CAD software to make a distribution map of pore diameter and hole spacing, set the diameter of the channel to 10 μm, and set the hole spacing to 10 μm.
[0035] Step 3: The anodized aluminum foil is drawn according to the drawing at a wavelength of 355nm and a laser moving speed of 2000mm·s -1 , the pulse repetition frequency is 20kHZ, and the light source power is 20W to carry out laser etching to obtain the required aluminum foil with a dielectric layer-p...
Embodiment 2
[0039] Different from the parameters in the preparation method of Example 1: the anodic oxidation electrolyte is boric acid solution and ammonium pentaborate solution; the anodic oxidation voltage and current density are 100V, 20mA·cm -2 ; The diameter of the hole is 20μm, the distance between the holes is 20μm; the wavelength is 355nm; the laser moving speed is 1000mm·s -1 ; The pulse repetition frequency is 30kHZ; the light source power is 20W. Other conditions and parameters are the same as in Example 1.
[0040] The prepared negative electrode material is assembled into a soft-packed aluminum battery, and the assembly sequence is as follows: aluminum plastic film + positive electrode material (expanded graphite) + diaphragm + electrolyte + negative electrode material (media layer - porous aluminum foil) + aluminum plastic film. The above-mentioned assembled devices were subjected to constant current charge-discharge and cycle stability tests with a blue-electric test syst...
Embodiment 3
[0043] Different from the parameters in the preparation method of Example 1: the anodizing electrolyte is boric acid solution and ammonium pentaborate solution; the anodizing voltage and current density are 200V, 50mA·cm -2 ; The diameter of the hole is 50μm, the distance between the holes is 50μm; the wavelength is 532nm; the laser moving speed is 500mm·s -1 ; The pulse repetition frequency is 50kHZ; the light source power is 20W. Other conditions and parameters are the same as in Example 1.
[0044] The prepared negative electrode material is assembled into a soft-packed aluminum battery, and the assembly sequence is as follows: aluminum plastic film + positive electrode material (expanded graphite) + diaphragm + electrolyte + negative electrode material (media layer - porous aluminum foil) + aluminum plastic film. The above-mentioned assembled devices were subjected to constant current charge-discharge and cycle stability tests with a blue-electric test system. The test r...
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Abstract
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